My Echo PB-770T review verdict: buy it for big open ground, orchard alleys and farm yards, and skip it for a small lot or a weak back.
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According to ECHO, this 63.3 cc X Series blower moves 756 CFM and 33 N of force at the nozzle. It charges you in shoulder load, noise and upkeep.
I clear the work pad, the gravel yard and the pruning litter around my 3.7-acre orchard, so I judge a gas backpack by what it asks of me at the end of a long job.
Echo PB-770T Review and My Verdict in Brief
I recommend the ECHO PB-770T Gas Backpack Leaf Blower for large open ground, where a handheld needs pass after pass. The trigger and speed-holding lever sit on the tube. This review covers the T, the tube-throttle version; the Echo PB-770H moves the throttle to a hip arm and adds a stick handle.
- Who it suits: owners of large open ground, orchards and farm yards, and anyone who already mixes two-stroke fuel.
- What it does best: moves dry leaves, lawn debris and pruning litter at a held speed.
- Main trade-off: the whole load rides on your shoulders with no hip belt, and it needs plugs and earmuffs together.
What the Echo PB-770T Backpack Blower Is and What a Complete Unit Includes
The Echo PB-770 comes as a T and an H, and both use the same air-cooled two-stroke engine of 63.3 cc. The T puts the trigger and the speed lever on the tube.
According to ECHO’s manual, a complete PB-770T is the power head, four pipes, two clamps, a quick start guide, the warranty statement and a cold weather intake cover. You bring the fuel, the two-stroke oil, a mixing bottle and your own ear and eye protection. ECHO prints the name as PB-770T, and owners often write Echo PB 770T.
Echo PB-770T Specs and What the Manual Says
The blowing force and the weight decide the fit, and the weight row states its basis.
| Spec | Figure |
|---|---|
| Airflow, maker’s figure | 756 CFM |
| Air speed with pipes, maker’s figure | 234 mph maximum |
| Blowing force, maker’s figure | 33 N at the nozzle |
| Fuel tank | 68.3 fl oz, see-through |
| Dry weight, maker’s figure | 21.6 lb without pipes |
| Sound at 50 ft, maker’s figure | 73 dB(A) |
Setup and First Use
Assembly follows this order.
- Fit a clamp on each end of the flex pipe, with the cable guide loop on the elbow end, and run the anti-static wire through the flex and swivel pipes.
- Push the flex pipe onto the elbow, let the handle hang free so the throttle cable stays untwisted, and fit the handle on the swivel pipe with the knob hand tight.
- Clip the cable into the guide loop, then turn the straight pipes clockwise into their locking channels until firm, without forcing them.
The pipes loosen with use, and refitting the two straight pipes tightens them, so I check them at every refuel. ECHO wants two tanks of break-in before any carburetor adjustment, and I leave the screws alone for those tanks.
Start it outdoors on bare ground, 10 ft from the fueling spot. For a cold start, set the lever to idle, move the choke to COLD START, press the purge bulb until fuel shows plus four or five more times, and pull the rope in short pulls until the engine fires or you reach five. Then move the choke to RUN, pull until it runs and let it idle for several minutes.
If it does not start with the choke at RUN after five pulls, move the choke back to COLD START and repeat. A warm engine starts the same way without closing the choke; after five pulls without a start, use the cold start steps. To stop the T, move the lever forward to idle, let the engine settle and push it all the way to STOP.
Performance on Leaves, Wet Mats and Pruning Litter
Newtons say more about push than CFM or mph alone, because force depends on how much air moves each second and how much its speed changes (1). ECHO rates the Echo PB-770T leaf blower at 33 N.
Dry Leaves and Lawn Debris
Before the first mow after leaf fall I run it at moderate speed across the lawn and push twigs and seed pods to the edge, so the mower does not throw them.
Wet Leaf Mats
A water film makes wet leaves cling to each other and to the ground, and a soaked mat adds weight, so the air has to get under the mat. After rain, the mat against the wall of my tool shed lifts when I hold the nozzle low and sweep under its leading edge, while a high sweep skates over the top. A thick, soaked mat takes more passes, so I work it in layers.
Pruning Litter and Gravel
In late winter I clear twigs and sawdust from under a row of plum trees, and ECHO’s advice to loosen heavy debris with a rake first is worth the minutes. On the gravel yard higher speed throws stones, so I hold the pipe low, keep the stream away from windows, the car and people, and wear safety glasses and a dust mask.
Fuel, Run Time and Refueling
ECHO publishes no run time for the US model, so plan the job in tanks and learn how long the 68.3 fl oz tank lasts on your own ground.
The Echo PB-770T fuel mixture is 50:1, which is 2.6 fl oz of oil per US gallon of fresh unleaded gasoline rated 89 octane or higher. According to ECHO, use oil that meets ISO-L-EGD and JASO M345-FD, because other oil voids the two-stroke engine warranty.
Up to 10 percent ethanol is allowed, but E15 and E85 are out. In a 2009 test of 28 small engines for the US Department of Energy, ethanol blends made open-loop engines run leaner and hotter (2), so I read the pump label before I fill the can.
Use the mix within 30 days, or 90 with a stabilizer, and I write the mixing date on the can. Refuel outdoors on bare ground with the engine stopped and cooled, and move 10 ft from the fueling spot before you start.
Weight, Harness and Comfort
ECHO’s manual lists the PB-770T at 21.6 lb dry, and that leaves out the pipes. A full tank adds about 3.4 lb. ECHO lists padded shoulder straps and a vented back pad and no hip belt, so everything rides on your shoulders.
A load-carriage study found that strap force and contact pressure at the shoulders and hips predicted how much discomfort carriers felt (3), so I set the straps snug before every start. On a long session my shoulders tell me first, and the exhaust smell stays on my jacket until I wash it.
Noise, Vibration and Hearing Protection
ECHO rates the sound at 73 dB(A) measured 50 ft away, a bystander rating, and publishes no value for the operator’s ear. NIOSH recommends 85 dBA over an eight-hour day (4), and a study of agricultural backpack machines measured above 100 dB(A) on all but one unit (5).
The manual orders safety glasses, hearing protection and a face filter mask. Plugs and earmuffs go on together before I touch the rope and stay on until the engine has stopped. A Cochrane review notes that poor fit may limit earplug protection for about 40 percent of users (6), so I press each plug in until it seals.
ECHO gives no hand vibration value. Median readings on a backpack leaf blower and a backpack mist blower ran from about 1.7 to 2.9 m/s2, and the exposure builds with hours on the trigger (7), so I take breaks and wear gloves.
Maintenance and the Manual’s Upkeep Schedule
Before each use, ECHO has you inspect and clean the air filter, cooling system and starter rope. Every 3 months at most, replace the air filter, inspect the fuel filter, spark plug and fuel cap gasket, and clean the exhaust port. Every year, replace the fuel cap gasket and service the fuel filter.
The Spark Arrester Rule in Full
ECHO sets three rules for the spark arrester screen in the muffler. Run the engine at wide open throttle for at least 5 minutes every hour, because steady low speed leaves carbon on the screen. Inspect and clean the screen after about 40 hours, and at least every 3 months. Carbon in the muffler cuts engine output and causes overheating.
To clean the screen, disconnect the spark plug lead, take the covers, gaskets and screen out of the muffler, replace the screen if carbon has plugged it, then refit everything. Take care not to damage the catalytic element inside the muffler.
The Echo PB-770T spark plug is an NGK BPM8Y with a 0.65 mm gap. If the idle changes when you move the pipe, or the engine will not reach wide open throttle, set the throttle cable free play to 4 to 6 mm at the trigger. Do not run the blower below 15 F, because the fuel lines can be damaged.
Warranty and the Amazon Seller Question
According to ECHO, the PB-770T carries a 5 year warranty for home use and 2 years for commercial, agricultural or income-producing use. My orchard sells fruit, so I read the 2 year term as mine.
The Amazon listing is a reseller offer, and its description says the unit is bulk packed. Before you order, check on the listing that the offer is the complete blower with its pipes, and read the seller’s return terms. ECHO’s warranty covers units sold by authorized ECHO dealers.
Who Should Buy the Echo PB-770T and Who Should Skip It
Ground size and your shoulders decide this one more than the spec sheet does.
Buy It If
- You clear large open ground, an orchard or a farm yard.
- You want the speed held on the tube lever.
Skip It If
- Your lot is small.
- Your shoulders complain under a pack with no hip belt.
- You want a maker’s ear-level noise figure before you buy.
- You work below 15 F or dislike mixing fuel.
Echo PB-770T Problems and Drawbacks
Three things cost you on a long job: the load on your shoulders, the upkeep of the engine and the fuel.
- Shoulder load and noise: 21.6 lb dry without pipes plus fuel, no hip belt and noise that needs plugs and earmuffs together, so I plan breaks on long jobs.
- Plugged spark arrester screen: the engine loses output and overheats, so I keep to the hourly wide open run.
- Fuel, filter and cable: stale fuel, a dirty air filter and wrong throttle cable free play are other causes in ECHO’s troubleshooting chart; filter jobs are level 1 in the manual and the spark arrester screen is level 2.
How the Echo PB-770T Compares With Alternatives
The maker figures for three close gas backpacks line up below.
| Maker’s figure | PB-770T | PB-9010T | Husqvarna 360BT | Husqvarna 570BTS |
|---|---|---|---|---|
| Airflow, CFM | 756 | 1,110 | 631 in the pipe | 768 at the round nozzle |
| Force, N | 33 | 48 | 30 | 37 |
| Weight, as each maker states it | 21.6 lb dry, without pipes | 26.4 or 27.2 lb dry, with pipes, by serial range | 23.2 lb, without fuel | 24.7 lb dry |
| Tank, fl oz | 68.3 | 83.8 | 74.4 | 74.4 |
Husqvarna 360BT
According to Husqvarna, the Husqvarna 360BT Gas Backpack Leaf Blower moves 631 CFM in the pipe and 30 N, and it gives 95 dB(A) at the ear and 2.5 m/s2 of vibration. A buyer who wants operator figures from the maker before ordering finds them here.
Echo PB-9010T
According to ECHO, the ECHO PB-9010T Gas Backpack Leaf Blower is the step up, with 1,110 CFM, 48 N and an 83.8 fl oz tank, and thick wet leaf mats are the job that extra force is for.
Husqvarna 570BTS
The Husqvarna 570BTS Gas Backpack Leaf Blower gives 768 CFM at the round nozzle and 37 N according to Husqvarna.
Is the Echo PB-770T Worth Buying? My Recommendation
The PB-770T is worth buying for large open ground, an orchard alley or a farm yard, where a speed-holding lever and 756 CFM keep long passes steady. You pay in shoulder load, noise that needs plugs and earmuffs together, and a routine of fresh 50:1 mix and a clean spark arrester. Check the seller and the contents of the Amazon offer before you order.
For a small yard, my leaf blower guides cover cordless options.
My Echo PB-770T review verdict is a buy for owners of orchards, farm yards and other large open ground who already mix two-stroke fuel and accept the shoulder load, and a pass for small lots, weak backs and anyone who wants a maker’s ear-level noise figure.
Frequently Asked Questions
What’s the difference between ECHO pb 770T and pb 770H?
The difference between the ECHO PB-770T and PB-770H is the throttle: the T has a trigger and a speed-holding lever on the tube, and the H has a hip arm and a stick handle. Engine, airflow and tank match, and the H weighs 22.0 lb dry without pipes against 21.6 lb.
Are ECHO backpack blowers any good?
ECHO backpack blowers are good tools for big yards and orchards, judged on the PB-770T’s 756 CFM and its 5 year home warranty on units from authorized dealers. They are also loud and heavy and need a fuel mix, so they are a poor match for small lots or tight yards.
How do you start an Echo PB-770T?
To start a cold Echo PB-770T, set the lever to idle, move the choke to COLD START, press the purge bulb until fuel shows plus four or five more times, and pull in short pulls until it fires or you reach five. Then move the choke to RUN, pull until it runs and idle it several minutes.
What is the correct gas mix for an Echo PB-770T?
The correct gas mix for an Echo PB-770T is 50:1, which is 2.6 fl oz of oil per US gallon of fresh gasoline rated 89 octane or higher. Use oil that meets ISO-L-EGD and JASO M345-FD, avoid E15 and E85, and use the mix within 30 days, or 90 with a stabilizer.
What are the common problems with the Echo PB-770T?
The common problems with the Echo PB-770T come from upkeep: a plugged spark arrester screen, stale or wrong fuel, a dirty air filter and a throttle cable with the wrong free play. The limits are the shoulder load with no hip belt and the noise that needs plugs and earmuffs together.
References
- NASA Glenn Research Center. Thrust Equation. Beginners Guide to Aeronautics. Updated June 10, 2026.
- Knoll K, West B, Clark W, et al. Effects of Intermediate Ethanol Blends on Legacy Vehicles and Small Non-Road Engines, Report 1 – Updated. NREL/TP-540-43543; ORNL/TM-2008/117. National Renewable Energy Laboratory; 2009.
- Wettenschwiler PD, Lorenzetti S, Stämpfli R, Rossi RM, Ferguson SJ, Annaheim S. Mechanical Predictors of Discomfort during Load Carriage. PLoS ONE. 2015;10(11):e0142004.
- National Institute for Occupational Safety and Health. Noise-Induced Hearing Loss. Noise and Hearing Loss. Centers for Disease Control and Prevention; 2024.
- Calvo A, Preti C, Caria M, Deboli R. Vibration and Noise Transmitted by Agricultural Backpack Powered Machines Critically Examined Using the Current Standards. IJERPH. 2019;16(12):2210.
- Morata TC, Gong W, Tikka C, Samelli AG, Verbeek JH. Hearing protection field attenuation estimation systems and associated training for reducing workers’ exposure to noise. Cochrane Database of Systematic Reviews. 2024;5(5):CD015066.
- Alamin Gabasa SA, Md Razali KA, As’arry A, Abdul Jalil NA. Vibration Transmitted to the Hand by Backpack Blowers. IJAME. 2019;16(2):6697-6705.
Safety Note: Leaf blowers throw debris and can damage your hearing. Wear eye and ear protection, read the manufacturer’s manual, and check your local rules on noise and operating hours.